text: A synonym is a word or phrase that means exactly or nearly the same as another word or phrase in the same language.Words that are synonyms are said to be synonymous, and the state of being a synonym is called synonymy.The word comes from Ancient Greek syn (ÏÏÎ½) (with) and onoma (á½Î½Î¿Î¼Î±) (name).ef: K.4375. A synonym is a word or phrase that means exactly or nearly the same as another word or phrase in the same language. Words that are synonyms are said to be synonymous, and the state of being a synonym is called synonymy. The word comes from Ancient Greek syn (ÏÏÎ½) (with) and onoma (á½Î½Î¿Î¼Î±) (name).